Night, true name “Shika Nighten” aged 16, partially from the Kaiten family of water mages. A silver haired, half cat guardian of the gate that crosses from the spirit realm to the world of the living. She is a complete softie to friends, but can be stronger than nearly anything if she is inspired enough, and she has had a hard past because of her position as gatekeeper. She can transform into anything she wishes, but the transformations are temporary, and in most, she cannot speak or move because of an error in the process. Her most natural form is mostly human, but with her ears and tail, and by some from her realm she is perceived to be a cat demon and is often attacked.
Star, true name “Shika Mira” aged 4, sister of Night. Though she is young, she understands nearly too much for her age, and was nearly kicked out of the village for it. Black haired and also half cat, she wanders off into the world of the living quite often, and tends to find a lonely kid of nearly any age at the park to play with. When she transforms into full human, she can’t get rid of her ears, no matter how hard she tries, and she can barely transform into an older human (older than four years old). She finds Haruki at the park and he secretly follows her to where Night is, where he sees both she and her sister transform into humans.
Haruki, true name “Shika Haruki” aged 15, is a normal boy from the world of the present living (there is present living and past living worlds) Japan, and though he has the same last name as Night, they have no relationship. He was born with the symbol “unmei” or destiny on his upper back, and was treated as if he were an evil ghost, and so searches for anyone who might be able to remove the sign. When he meets Night, he asks her to remove it from him, but she refuses because she is unable to perform such a deed to someone such as him. He is stubborn and acts as if he doesn’t want to be there with her and is only there until she can take the symbol, but she grows on him and he gains a crush on her.
Key, true name “Kikaya Arya” aged 16, is a girl from the world of the present living Japan, who has a crush on Haruki. Her family originated from Japan, but she had only moved to Japan from the United States when she was 8. One day after school she hears Haruki talking to himself and follows him. When she runs into Star as a kitten, she touches Star’s collar, Night is revealed in her natural form. Key immediately freaks and is nearly killed by Night when both Star and Haruki stop Night in her tracks. Key wishes to see her dead parents, and begs Night to go through the portal and see them, but Night also refuses this offer because once some one from either side of the gate crosses over, they can not come back. Key joins the group in hopes that somehow her parents should speak to her through the gate, and also she would jump at any chance to be with Haruki.